Northern Airborne Technology NPX138 - Manual (Page 39)

SM41 Rev. 4.00 NPX138 Panel Mount Radio Manual
3.5
General Controls — Normal Operating Mode
Channel Switch Brightness Switch Edit Switch Squelch Pushbutton
The General Controls are those labeled in the above diagram and affect the over-all
operation of the radio. The position of the EDIT switch determines the operating mode
of the radio. The other three controls (the two center-off momentary switches and the
pushbutton) have dual functions, operating differently depending upon the selected
operating mode.
When the EDIT switch is in the center position (as shown), the radio is in ‘Normal’
operating mode and the functions of the other switches are those of the upper label.
Lock the EDIT switch to either the left (CH) or right (ST) position, to set the radio in one
of the two ‘EDIT’ modes. In both ‘EDIT’ modes, the functions of the other switches are
those of the lower label. Engraved panel lines tie related Edit functions together. See
sections 3.7 and 3.8 for further details on editing.
3.5.1
Channel Switch
To scroll to the desired channel use the CHAN switch. Momentarily press it to the right
‘+’ to increment by one channel and to the left ‘-’ to decrement by one channel. Holding
the switch in either the left or right position causes the radio to continue to change
channels with increasing speed. This allows for quick selection of any channel.
Remote channel selection is possible with the installation of an external switch.
3.5.2
Brightness Switch
The BRIGHT switch controls the brightness of the radio display. Momentarily press it to
the right ‘+’ to increment the display brightness by one level and to the left ‘-’ to
decrement by one level. There are seven brightness levels from which to select. The
radio will retain the display brightness information when turned off, but on power up will
limit brightness to a maximum of level five.
Nov 10, 2003 Page 3-5
ENG-FORM: 806-0105.DOT
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